Rotary pump adapted to be supported and actuated by a power take-off shaft of a motor



Jan. 19, 1954- G. w. HARTWELL 2,666,395

ROTARY PUM DAPTED SUPPORTED TO BE AND ACTUA D BY A POWER TAKE-OFF SHAFT OF A MOTOR Filed Dec. 21, 1949 GEORGE w, HARTWELL INVENTOR. BY 1 Patented Jan. 19, 1954 ROTARY PUMP ADAPTED TO BE SUPPORTED AND ACTUATED BY A POWER TAKE-OFF SHAFT OF A MOTOR George W. Hartwell, Springfield, Mass., assignor to Worthington Corporation, a corporation of Delaware Application December 21, 1949, Serial No. 134,330

2 Claims. (01. 103-118) This invention relates to pumps of the rotary type and an object of the invention is to provide a cheap, simple pump structure, the rotor of which is mounted directly on the shaft of its operating motor in such manner as to eliminate couplings, and the need of specially constructed motors or motor shafts and to eliminate the need of a pump base.

A further object of the invention is to provide simple inexpensive means to prevent rotation of the casing of the pump during its operation.

With these and other objects in view, as may appear from the accompanying specification, the

invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a rotary pump adapted to be supported and actuated by a power takeofl. shaft of a motor of a preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings:

Figure 1 is a longitudinal section through a pump constructed in accordance with the present invention showing it mounted on the power take-01f shaft of an electric motor.

Figure 2 is a section on the line 2-2 of Figure 1.

Referring more particularly to the drawings, I indicates a standard type electric motor having a power take-off shaft 2. The pump 3 includes a casing 4 having the usual fluid intake and outlet ports 5 and 6. A rotor l is mounted within the casing 4 of the pump 3, and in the drawings the rotor l is of the sliding vane type including a plurality of radially extending sliding vanes 8 which cooperate with the eccentric bore 9 of the casing for pumping the fluid. While the drawings show a sliding vane type of pump, k

it is to be understood that the invention is equally applicable for employing gear pumps wherein the rotor comprises a toothed member or gear in lieu of the sliding vanes. Such gear pumps are well known and are quite old.

The pump structure 3 is wholly supported upon the shaft 2 thus eliminating the need of a pump base and its correspondin cost.

Thus the rotor 1 is formed integral-1y with a lateral projection or real wood extension la. The extension la extends outwardly of the casing 4 through an opening 4a and is provided with a longitudinally extended axial bore for recess II which runs inwardly from the outer end of the extension la, to provide means to receive the 2 power take-off shaft 2. The extension la has a set screw I2 or any other suitable means adjacent its outer end to fixedly connect the rotor for rotation with said power take-01f shaft 2.

The shaft 2 thus supports and rotates the rotor 1 without contacting the casing 4. The casing is in turn supported on the extension la of the rotor by means of a bearing portion l3 formed thereon havinga lesser diameter than the rotor which bearing portion rotates in a bearing member l4 mounted in the casing in abutment with an annular stop shoulder l5 formed inwardly of the opening 4a. The reduced diameter of the bearing portion l3 and the annular stop shoulder 15 act to prevent lateral movement of the bearing member I 4.

Means are provided for preventing rotation of the pump casing during rotation of the rotor and such casing anchoring means may constitute the bolt 16 attached to the motor I to the outer end of which bolt is attached a bar [7. The bar I! engages against an abutment l8 formed on the casing 4 of the pump so as to hold the casing against rotation. The casing 4 is shown in Figure 1 of the drawings as having a second anchoring structure connected thereto which comprises an anchor bar I 9 attached to or engaging the casing 4 of the pump and adapted to engage against any suitable abutment or stationary member 20 located in the vicinity of the pump.

Either one of the anchoring elements I! or l9 or both of them may be employed to prevent rotation of the casing of the pump during rotation of its rotor.

What is claimed is:

1. A rotary pump operated and wholly supported by the power take-01f shaft on a motor including a casing having an opening on the side adjacent the power take-ofi shaft and an annular shoulder formed in the casing inwardly of said opening, a pump rotatable in said casing and having an extension projecting outwardly through said opening with a bore in the outer end thereof to mount said rotor on said power take-01f shaft, and means to lock said rotor extension to said power take-off shaft to allow said rotor to rotate therewith, a bearing portion formed integrally with said extension on the portion thereof disposed inwardly of said opening. a bearing member mounted in said casing and abutting said annular shoulder, said bearing member mounted on said bearing portion of the extension to wholly support said casing thereon, and means to prevent rotation of said casing on rotation of said rotor.

lar shoulderwformedainesaid casing; inwardly of said opening, .;a;pump"=rotor rotatable in..said;:cas

ing and having an extension projecting through said opening, said extension having a bore formed:

therein to receive said power take-off shaft, looking means to connect saidiextensiom on"; said" power take-off shaft for rotation of said rotor therewith, a bearing portion formed on said extension of the rotor on thenportion .therteoffjusti inwardly of the opening, and a t'bearing element 4 mounted on said bearing portion and in abutment with said annular shoulder to wholly support said casing, and means to prevent rotation of said pump casing upon rotation of said power take-off shaft.

GEORGEaL-W:

References Cited in the file of this patent UNITED STATES PATENTS Number: Name Date 1,054,;762 Goeth-ret a1. Mar, 4, 1913 138314561 Strickland Mar. 23, 1920 1,585,378. Denison May 18, 1926 1.6532531? .Hillb'orn Mar. 20, 1928 

